*{
    margin: 0;
    padding: 0;
}
ul,li{
    list-style: none;
}
a{
    text-decoration: none;
    outline: none;
}

body{
    font-family: "微软雅黑";
    font-size: 16px;
    width: 750px;
    margin:0 auto;
}
img{
    display: block;
    max-width: 100%;
}


